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lexicophobia (s) (noun)
, lexicophobias (pl)
An excessive anxiety about having to go to a dictionary for information; perhaps because of some degree of illiteracy, dyslexia, or for some other linguistic issue: "Willie had lexicophobia in that he hated to look up any anything in a dictionary; probably, because he had a simple lack of sufficient motivation to go to the trouble of looking up words."
"Margaret's lexicophobia existed because she was so frustrated about dictionaries using another form of the same word being defined; such as, when she looked up the word manicurist in more than one dictionary, they all indicated that a manicurist is someone who manicures.